Cannot launch any java webstart applet

Question

Every time I try to launch a JNLP file, I get the error "Could not start the Java Virtual Machine". I've tried decreasing/increasing the max memory heap size and launching the application through the cmd with no success. I have 8 GB of RAM and Java is permitted to use 5GB. Sorry if this is in the wrong place but I'm fairly desperate to get it working. Thanks.

Answer 1

Sorry, I forgot to come back to this post. I played around with some general Java memory settings and I can open them now. I've got 64 bit Java btw.