Dispatcher can not start with Exitcode -2 WHY?

Hi all ,

My dispather in my J2ee server cann't start with the Exitcode -2 and the Errors following:

Error occurred during initialization of VM

Incompatible initial and maximum heap sizes specified

[Thr 7156] JLaunchIAbortJava: abort hook is called

[Thr 7156] **********************************************************************

• ERROR => The Java VM aborted unexpectedly.

• Please see SAP Note 943602 , section 'Java VM crashes'

• for additional information and trouble shooting.

**********************************************************************

[Thr 7156] JLaunchCloseProgram: good bye (exitcode = -2)

(the jdk path in VM properties file is crrect)

Anybody know what's the problem?