[plt-scheme] Create Executable not working in CVS build

Hi,
For some reason running "Create Executable..." in my DrScheme cvs build 
(version 299.17-cvs13oct13oct2004 on linux) yields the following 
"DrScheme Internal Error":

procedure create-executable method in 
/home/alex/devel/scheme/plt/collects/drscheme/private/module-language.ss:49:8: 
expects 4 arguments, given 3: #<struct:module-language-setti... 
#<struct:object:/home/alex/dev... #<path:/home/alex/devel/scheme...

I've looked at module-language.ss line 49 but I can't make sense of the 
code. Can anybody help?

Thanks
Alex