java.lang.OutOfMemoryError.Error is null

Hi
While deploying the adobe-livecycle-websphere.ear file iam getting the "java.lang.OutOfMemoryError.Error is null." Can you help in rectifying this error?
We are Thinking that this error is because of heap size, if we are correct please do let us know how to increase the heap size.
We kept Initial Heap Size box as 256 and the Maximum Heap Size box 1024.Also we tried with Maximum Heap Size box as 0(Zero) but we are getting the same error. Please Help us ....