Peoplesoft 6 Financials with Informix

Hi, This has more to do with Peoplesoft Financials than Informix. Anyway does anyone using Peoplesoft on Informix encountered a 'Illegal operation error(GPF)" on client machine. The peoplesoft consultant I spoke to claimed that it could be the slow response of the SQL query that causes the error(database not tuned properly, network problem, connectivity problem, anything but Peoplesoft bugs) . I would like to get in touch with anyone who has encountered similar errors. If you happen to know of a discussion/web site other than Peoplesoft that offers solution/suggestion to problems, I would like to know. Any help offered is greatly appreciated. Regards, Terence Chang