[Dev-C++] Need help on a access violation message I get when compiling in DevCpp

I'm running the 4.01 version of DevCpp (delivered on the Bloodshed Software
CD) on an NT4 system with SP6. I load an old project and compile it,
everything is OK, but after I add some code and try to recompile I get the
following message:

Access violation at address 00403CA0 in module "DevCpp.exe". Read of address
2AF86DEB

Clicking the OK button of the message runs another message that says:

Invalid pointer operation

The only way to get out now is to get the Task Manager list and to quit
DevCpp from there.
I tried to unload any background tasks and any other running programs so
that DevCpp will run alone but I get the same message (maybe with some other
memory addresses). I don't think the message is generated by the nature of
the code I load, because the same happens with any project I load. So
follows the natural question: is my system screwed or there is something
with the compiler? If anyone has an idea I'll deeply appreciate.

Thanks in advance
Nico