How do create several Potantials to one Account

How do create several Potantials to one Account

Hi
I want to create some Potentials for one Account the problem is, that the "Account Name" field in the potential is not filled in...

My code

$AXMLDATA = '
<Accounts>
<row no="1">
<fieldlabel value="Account Name">TestUser</fieldlabel>
<fieldlabel value="Email">test@test.test</fieldlabel>
<fieldlabel value="boolean flag">TRUE</fieldlabel>
<fieldlabel value="First contact">01.01.2009</fieldlabel>
<fieldlabel value="Last Login">05.10.2009</fieldlabel>
</row>
</Accounts>';

$PXMLDATA = '
<Potentials>
<row no="1">
<fieldlabel value="Potential Name">First Potential</fieldlabel>
<fieldlabel value="Description">description of the potential</fieldlabel>
<fieldlabel value="Closing Date">01.04.2009</fieldlabel>
<fieldlabel value="Account Name">TestUser</fieldlabel>
<fieldlabel value="Email">test@test.test</fieldlabel>
<fieldlabel value="Stage">"-data-"</fieldlabel>
<fieldlabel value="boolean flag">TRUE</fieldlabel>
<fieldlabel value="product">FREE</fieldlabel>
<fieldlabel value="Date of Birth">01.01.1970</fieldlabel>
<fieldlabel value="Mailing City">Germany</fieldlabel>
</row>
</Potentials>';

The potential should be adapted to the Account entry. I mean, that on the account details page of TestUser should be an entry below Potentials. Analog to this i want to create Contacts which belong to an Account.
Any suggestions how i can combine these fields?

Thank you for your help
Regards
Jan