TS web access - RemoteApp Disconnected

Hi Everyone,
 
I deployed Terminal Server Role, Terminal Server Licensing Role and Terminal Server Web Access on a consolidated server. Well i published desktop connection in TS web access over ISA 2006 and it works fine. Also I added the calculator and wordpad aplication  like remote aplication in the TS Web Access web site. When i connect to the remote aplication (Calculator and wordpad) over TS web access web site  it show me an error " RemoteApp Disconnected - The remote computer colud not be found, please contact you Helpdesk about this error". i don't know why it show me that error, because when i connect for remote desktop through ts web access web site it works fine.

Somebody can help me for fix this problem?

Thanks.