Foxpro for windows 2.5

We have a network running on Windows server 2003 with workstations running on windows xp. We have programs developed in foxpro for windows 2.5 residing on the server together with the database files. All workstations run the executable files found on the server. I have for years run foxpro on the server itself to build the executable files. Recently on 01.04.11, 2 windows updates were installed: security update for windows server 2003 - KB2524375 and update for windows server 2003-KB971029. Following these updates, foxpro can no longer be run on the server. The message foxpro.exe is not a valid win32 application is obtained when I try to run foxpro. However, on the workstations running Windows XP, foxpro can be run without any problem and it is the same excecutable file residing on the server which is run, that is a shortcut pointing to the executable file on the server in found on the desktop of the workstations. Also the programs developed in foxpro continue to run without any problem. I am afraid that we may not be able to run these programs on the workstations also in the future. Can anybody please help me solve this problem? Thank you