compile error

BlitzMax Forums/BlitzMax Beginners Area/compile error

Why do I get the following error

Building untitled1
Linking:untitled1.debug.exe
C:/BlitzMax/BlitzMaxBeta105/bin/ld.exe: cannot open output file C: Permission denied
:/BlitzMax/BlitzMaxBeta105/tmp/untitled1.debug.exe
Process complete

And why can I not delete the file
C:/BlitzMax/BlitzMaxBeta105/tmp/untitled1.debug.exe