Pg & Tcl - is it dying out?

As our production system are being upgraded to Windows 7 64-bit we are finding that our Tcl apps which use the PgTcl client libraries are now failing (couldn't load library "libpgtcl.dll": invalid argument). We have tried downloading the latest binaries (which are 32 bit) but the problems persist. There is little activity on the sourceforge page for the lib. There is little activity on the related forums and I am not optimistic about being able to get timely responses from the developers.

Are we seeing the demise of PG & Tcl? Should I advise my client to NOT upgrade any systems running Tcl apps and stick with legacy OS’s?

Carlo