Hello Navision Fans

I am looking for solution, I hope you can help me, guys
Current situation:
About 30 XP 's computers in 2003 windows domain, we have citrix server with Navision 5.0 SP1 in another city.
Every user use citrix client and run Navision.
most of users use Navision data and copy to excel 2007 (ctr+c, ctr+v)
From some time few users cannot use ctr+c, ctr+v combination
They copy data from Navision, paste into excel and nothing.

I spoke with our Navision support but they said check regional setting on local computer and on citrix.
Please help me guys !!
Comments
http://community.citrix.com/pages/viewpage.action?pageId=71696718
http://support.citrix.com/article/CTX104631
http://support.citrix.com/article/CTX104631
Give those a shot, let us know if you find anything.
"Profanity is the one language all programmers know best."
Can you get a Citrix expert in t look at this? It really has nothing to do with Navision and the NAV partner may not really be qualified, I am sure they can do it, but it might take them many hours, where a Citrix expert will fix it in 10 min. ANd they will probably do it remotely.
RepairCBDChain.exe works fine and I dont see problems with coping data from Navision to excel
So problem was Clipboard
BUT
If I paste data to excel that every column with numbers are identified as text
any clue guys ?
Most likely a region setting
2,345.22 vs 2.345,22 vs 2 345.22
Citrix server and your local client must be set up the same.