not 100% sure but you can always try this
start - control panel - java (tea cup icon) - temporary internet files - settings... - delete files then press OK
did you try this?
he "invalid access to memory location 998" error occurs because the 32-bit file structure that is used in the application execution function is not correctly handled in the 64-bit environment. Here is a suggestion that may correct the issue. A supported hotfix is available from Microsoft:
http://support.microsoft.com/kb/833620This post was edited by ShadowFiend on Jul 17 2011 02:06pm