Do you face such a problem?
When you add data type to a variable under BPEL in eclipse Juno, and click on Browse button in figure1, Browse button doesn't work.
So to solve this, There are two ways:The first way: Edit "yourfilename.bpel" file in eclipse using text editor:
Right click on your bpel file under Project Explorer > open with > Text Editor
|Open .bpel using text editor|
|add your xmlschema in the shown format|
|define your variable data type by refering to ns1 or ns2 as you need|
and in <bpel:variables> write before the type "ns1:" as a mark to its location in <bpel:process> as follow:
<bpel:variable name="iterator" type="ns1:int"></bpel:variable>
The second way: Install Eclipse Indigo, and it will work successfully without doing the above steps.
I hope this Help :)