Has anyone else observed this behavior?

Building an .exe with VFP 7.0 SP1 and utilizing SQL Server 2000 SP2. I have no other configurations to test.

In Windows XP the following line of code will not work in XP Service Pack 1 but does work for XP without SP1 and all prior versions of Windows.

SQLEXEC(oApp.ch,"{CALL vsp_woValid(?lcJOBID,?lcEqid)}")

This line of code does work for all versions of Windows including XP SP1.

SQLEXEC(oApp.ch,"EXEC vsp_WoValid ?lcJOBID,?lcEqid")

Is there any advantage to using one method over the other? Perhaps Microsoft is no longer going to support the call functionality and I failed to catch that somewhere? Any thoughts or insights would be greatly appreciated.

Thank You