i can't input keyboard...

hi.

pocketcloud free 1.2.173.
samsung galaxy shw-m130l
ginger bread.

step 1. connect win 7
step 2. key input very good.
step 3. pocket cloud go to background mode.
step 4. return pocket cloud
step 5. key input bad. does not work keypad.
step 6. for input key, reconnect win 7

could you fix it?