[news.eclipse.technology.memory-analyzer] An out of memory error has occ

[mfishkis@xxxxxxxxx (Maya Fishkis)]

Hello All,

I am running a Java program using Eclipse3.4.2. in Windows Vista.
I have set  VM arguments :
              -Xms512m
              -Xmx1500m 
After the program runs for some time, the  error message pops-up:
?Java.lang. OutOfMemory Error?

My computer has 6GB of RAM but, if I try to increase the value of Xmx to 
2GB,
it doesn?t run and a message comes up:
?Could not reserve enough space for object heap?

I installed the Eclipse Memory Analyzer in the Eclipse using ?Software 
Updates and Add-ons? and tried to open the heap dump but then received the 
message:
?An out of memory error has occurred during parsing heap dump?

Can anybody give me advice on how to proceed?
Thank you in advance.

Maya