upgrade from 8.0.3 to 8.1.10 crash

Hello. I am trying to upgrade from PostgreSQL 8.0.3 to PostgreSQL
8.1.10. I'm on WindowsXP and I'm compiling with Visual C++ 6.0.

I have a very simple routine that works fine with the 8.0.3 version:

int easy_connect()

{

exec sql connect to my_db as my_cnxtn;

printf ("connection results:\n");

printf ("code: %d\n", sqlca.sqlcode);

printf ("state: %s\n", sqlca.sqlstate);

printf ("warn: %s\n", sqlca.sqlwarn);

exec sql begin work;

exec sql commit work;

return 0;

}

When I use the 8.1.10 version, the connection works ( sqlca.sqlcode is
0, sqlca.sqlstate is 0000 and sqlca.sqlwarn is blank). But it then
crashes on the "exec sql begin work" line.

I get the following error in a window:

Runtime Error!

Program: C:\testSQL.exe

This application has requested the Runtime to terminate it in an unusual
way.

Please contact the application's support team for more information.

I removed the 8.0.3 version using "remove program" from the control
panel. I then went and removed my C:\Program Files\PostgreSQL\8.0
folder, just to make sure I was not including the wrong header files,
linking to the wrong libraries, or calling the wrong version of
ecpg.exe.

Thanks for any help.

-Cheryl