Unable to open error message/msvcr90.dll

Hello

I am trying to create a thinapp of vmware view client. After creating the exe file i copy it to a windows XP machine and get an error of "unable to open". When I try to execute it on a Windows 2008 server I get an error of a missing dll - MSVCR90.dll although it is part of the build.

What can be wrong?

Thanks

O