Intellij 5.0 heap size Follow

Hello all,

Have defined in the 'idea.exe.vmoptions' file the following:
-

-Xms256m
-Xmx512m
-XX:MaxPermSize=128m
-ea
-

But the Intellij insists on activating the gc each time it approaches 256MB.
What is the way to set the Xms to 256 and the Xmx to 512.

Thank you,

Rami