It's me again. 

Right now  I changed my configuration and I plug all vDS with Trunks to only one switch. It's working but i have no redundancy :(

This is the output from show run command from 2 switches (I erased IP addresses and username data):

=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2012.10.02 11:30:30 =~=~=~=~=~=~=~=~=~=~=~=

console# show run

spanning-tree mode rstp

interface port-channel 1

switchport mode general

exit

interface port-channel 2

switchport mode trunk

exit

interface range ethernet g(13-36)

switchport mode general

exit

vlan database

vlan 200-300

exit

interface range ethernet g(13-36)

switchport general allowed vlan add 200

exit

interface port-channel 1

switchport general allowed vlan add 200

exit

interface range ethernet g(13-36)

switchport general allowed vlan add 201

exit

interface port-channel 1

switchport general allowed vlan add 201

exit

...

... so on, so on

...

interface range ethernet g(13-36)

switchport general allowed vlan add 299

exit

interface port-channel 1

switchport general allowed vlan add 299

exit

interface range ethernet g(13-36)

switchport general allowed vlan add 300

exit

interface port-channel 1

switchport general allowed vlan add 300

exit

interface port-channel 1

switchport general ingress-filtering disable

exit

voice vlan oui-table add 0001e3 Siemens_AG_phone________

voice vlan oui-table add 00036b Cisco_phone_____________

voice vlan oui-table add 00096e Avaya___________________

voice vlan oui-table add 000fe2 H3C_Aolynk______________

voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phone

voice vlan oui-table add 00d01e Pingtel_phone___________

voice vlan oui-table add 00e075 Polycom/Veritel_phone___

voice vlan oui-table add 00e0bb 3Com_phone______________

interface range ethernet g(1-2)

channel-group 1 mode auto

exit

interface range ethernet g(3-4)

channel-group 2 mode auto

exit

interface ethernet g1

gvrp vlan-creation-forbid

exit

gvrp enable

interface ethernet g1

gvrp registration-forbid

exit

iscsi target port 860 address 0.0.0.0

iscsi target port 3260 address 0.0.0.0

interface vlan 1

ip address ###

exit

ip default-gateway ###

username ###

no snmp-server enable traps

no snmp-server trap authentication

snmp-server community Dell_Network_Manager rw view DefaultSuper

Default settings:

Service tag: ###

SW version 2.0.0.35 (date  27-Jan-2009 time  18:13:34)

Gigabit Ethernet Ports

=============================

no shutdown

speed 1000

duplex full

negotiation

flow-control off

mdix auto

no back-pressure

interface vlan 1

interface port-channel 1 - 8

spanning-tree

spanning-tree mode STP

qos basic

qos trust cos

console# exit

=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2012.10.02 11:31:53 =~=~=~=~=~=~=~=~=~=~=~=

show rui n

spanning-tree mode rstp

interface port-channel 1

switchport mode general

exit

vlan database

vlan 200-300

exit

interface port-channel 1

switchport general allowed vlan add 200 untagged

exit

interface port-channel 1

switchport general allowed vlan add 201 untagged

exit

...

... so on, so on

...

interface port-channel 1

switchport general allowed vlan add 299 untagged

exit

interface port-channel 1

switchport general allowed vlan add 300 untagged

exit

interface port-channel 1

switchport general ingress-filtering disable

exit

voice vlan oui-table add 0001e3 Siemens_AG_phone________

voice vlan oui-table add 00036b Cisco_phone_____________

voice vlan oui-table add 00096e Avaya___________________

voice vlan oui-table add 000fe2 H3C_Aolynk______________

voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phone

voice vlan oui-table add 00d01e Pingtel_phone___________

voice vlan oui-table add 00e075 Polycom/Veritel_phone___

voice vlan oui-table add 00e0bb 3Com_phone______________

interface range ethernet g(1-2)

channel-group 1 mode auto

exit

gvrp enable

iscsi target port 860 address 0.0.0.0

iscsi target port 3260 address 0.0.0.0

interface vlan 1

ip address ###

exit

ip default-gateway ###

username ###

no snmp-server enable traps

no snmp-server trap authentication

snmp-server community Dell_Network_Manager rw view DefaultSuper

Default settings:

Service tag: ###

SW version 2.0.0.35 (date  27-Jan-2009 time  18:13:34)

Gigabit Ethernet Ports

=============================

no shutdown

speed 1000

duplex full

negotiation

flow-control off

mdix auto

no back-pressure

interface vlan 1

interface port-channel 1 - 8

spanning-tree

spanning-tree mode STP

qos basic

qos trust cos

console# exit

Hello again!
I already tried this few days ago but with no effect.
console(config-if)# switchport mode trunk
console(config-if)# switchport trunk allowed vlan all

Today I downloaded and upgraded firmware version. After short reboot I tried to use those commands again and at this time everything seems to be working properly.

Thank you very much for your help!