Need Excel VBa to display Arabic characters

I have two computers running same version of Office 2003 in Windows XP Pro. On one computer I can type Arabic words in VBA code (used to display alert messages to users). On another computer, Arabic characters are turned to garabage within the code, though I can type Arabic fine in Excel cells and in MS Word
What gives?
What could the second computer be missing that precludes VBA from displaying arabic characters?

Any help?

Thank you in advance
Alseikhan