MS Sql Server And Windows 2000/XP

Hi, I have a problem.

I have two computers (clients), one with Windows 2000 and second with
Windows XP. And a third computer (server) with a Windows 2000 and MS Sql
Server 2000.

I have a TABLE with two rows: 'row' and 'row ' (space).

And SQL: 'select * from TABLE where row = 'row'

If I run this SQL on computer with Windows 2000 it works ok (return only one
row: 'row').
If I run this SQL on computer with Windows XP it works really strange
(return two rows: 'row' and 'row ' ) - it can't see this spaces.

Is there differences between MS Sql Server on W2000 and WXP?

Thanks for the help

Magda