Is the sation global available on your second system? Remember that station globals are NOT saved in the sequence-file, but are stored in the stationglobals.ini (...\National Instruments\TestStand 3.5\Cfg\). You have to copy the ini file over to your second computer.
If you have done this, use the error-Cluster of LabView to get more information about what exactly is the problem. Visualize the path used in the VI, to check if maybe there is a problem with the station variable. Without more information it will be hard to help you.....