connecting to source db (no replies)

Hi,
I am trying a migration from informix to mysql using the migration tool - I have fallen at the first hurdle...can anyone give me a heads up on the following error:

Connecting to source database and retrieve schemata names.
The list of schema names could not be retrieved (error: 0).
ReverseEngineeringGeneric.getSchemata :C:\Program Files\IBM\Informix_JDBC_Driver\lib\ifxjdbc/jar;C:\Program Files\IBM\Informix_JDBC_Driver\lib\ifxsqlj/jar
Details:
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Unknown Source)
com.mysql.grt.modules.ReverseEngineeringGeneric.establishConnection(Unknown Source)
com.mysql.grt.modules.ReverseEngineeringGeneric.getSchemata(Unknown Source)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
com.mysql.grt.Grt.callModuleFunction(Unknown Source)

I am using the jdbc v3.00.JC3 and j2sdk1.4.2, informix 7.31. I can connect to the informix db through server studio no probs. Any ideas gratefully rec'd