Pocketcloud explorer works intermittently

Pocketcloud explorer works intermittently

I have installed pocketcloud desktop on Microsoft Windows SBS 2003 terminal server. I have selected 2 directories to share. Initially I accessed files remotely with project explorer on my ipad without any problems. Then I connected 2 other ipads to the same share which worked to start off with but now I often can't access files even though the project explorer software says I'm connected and all the diagnostics on the desktop software come back as ok. I can browse to the file I want but when I try to open it nothing happens.

Pocketcloud have given me a list of questions which I will now answer:-

1- What is the version NUMBER of PocketCloud you are using on your smartphone or tablet? 
(see link below if you don't know how to find this information)? (REQUIRED):

Pocketcloud Explorer Version 1.1.30

2- What version NUMBER of PocketCloud Windows or Mac Companion is installed/or are you trying to install on your computer(e.g. 2.4.17, 2.0.32S, NONE)?(REQUIRED):

2.5.13

3- What version of Windows are you using on your Computer (e.g. XP, Vista, Win 7, 2003 Server, 2008 R2 server)?:

Microsoft Windows 2003

4- What Edition of Windows are you using on your Computer (e.g. Home Premium, Professional, Enterprise, Ultimate)?:

R2 Terminal Server

5- What version of Mac OS X are you using on your Computer (e.g. Lion, Mountain Lion, 10.8.3)?:

Not applicable

6- What is the model of the smartphone or tablet you are using(e.g. Galaxy S3, iPhone, iPhone4, iPad3, Galaxy Tab 2

ipad 4

7- What is the version NUMBER of the operating system (Android/iOS) used on the smartphone or tablet?:

6.1.3

8- What are the exact error messages (if any) that you are getting:
a- on your SMARTPHONE or TABLET?:

ipad says error operation timed out

b- on your COMPUTER?:

No errors on computer

9- What Type of connection are you using on your smartphone or tablet(Select from options below)?

b- Discovered

10- What "Connection Method" are you using on your smartphone or tablet (Select from options below)?

b- VNC

11- Was this setup working before or is this a new installation? 

This is a new installation. It works intermittently

Thanks for your help