Using imported java classes in a pre-xlate class

I have a java class that runs during pre xlate that translates a field and accesses an iSeries to get the new value.  The class works fine when the XLT testing tool is used to run it.  I get the error below when the class is run normally.  I am using the IBM Toolbox for Java to access the iSeries.  I tried the toolbox in C:, D: and in the java_uccs folder in the server folder and got the same error.  Is there a certain folder where the toolbox should be?  Thanks in advance.

erroCode: java.lang.NoClassDefFoundError

errorInfo:

java.lang.NoClassDefFoundError: com/ibm/as400/access/AS400File

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Unknown Source)

at com.quovadx.cloverleaf.upoc.CloverEnv.makeUpocInstance(CloverEnv.java:1084)

   invoked from within

“makeUpocInstance $className $baseClass $args”

   (procedure “cljXLTStrings” line 33)

   invoked from within

“cljXLTStrings {CLASS GetLabPanel} {XLT_STYLE SINGLE}”