I have a similar problem, though i'm using SQL Server for my content store. the error is as follows:
UDA-SQL-0432 Unable to locate the gateway 'cogudatm' error generated in Framework Manager when trying to import metadata from a tm1 data source though the data source tests successfully in cognos administration. I've done this numerous times at other sites with TM1 as my data source and had no problems. I'm experiencing this at a current site. Any ideas?