CXTButton problem on XP SP2

I'm using a quite old Xtreme toolkit (version 4.0.0.0). It does work seemlessly with VS2005-generated code, but in ocxs the buttons are just eating the click messages - nothing happens. I did a workaround - copied some the CXTButton code to my derived class, that calls CButton methods directly - this way it works.
Note that the problem occurs with XP SP2 (no VS installed!), it's fine on Vista.

Any ideas (except upgrading ;-)) ? TIA

I understand that it doesn't but in fact it does in most cases - it's just the ocxs that need some kind of workaround. Any clues why the ocxs? Dlls and exes are fine.

oleg wrote: I don't have code of 4.0 :(

I'd say that he should be allowed to upload the source here for historical reasons

I would even suggest to Kirk that older versions should be released for free. Version 9.81 might be a good idea. Maybe even with a reduced feature set (CommandBar, Property grid, Docking pane only). What's in for Codejock? First, I don't think Codejock would lose any sales. Many developers would be happy with this components and some of them might later buy the latestet and greatest version.