I tested combine delivery with E51 and not working while it is working with nokia n90, E51 nokia place my key in invalid key folder, but when I go to detail it says it is valid has ony one idea what is the problem?? Thank you for your reply

Content-type: application/vnd.oma.drm.rights+xml
Content-Transfer-Encoding: binary

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE o-ex:rights PUBLIC "-//OMA//DTD DRMREL 1.0//EN"
"http://www.oma.org/dtd/dr">
<o-ex:rights xmlns-ex="http://odrl.net/1.1/ODRL-EX" xmlns-dd="http://odrl.net/1.1/ODRL-DD" xmlns:ds="http://www.w3.org/2000/09/xmldsig#/">
<o-ex:context>
<o-dd:version>1.0</o-dd:version>
</o-ex:context>
<o-ex:agreement>
<o-ex:asset>
<o-ex:context>
<o-dd:uid>cid:bla@cos.pl</o-dd:uid>
</o-ex:context>
</o-ex:asset>
<o-exermission>
<o-ddlay>
<o-ex:constraint>
<o-dd:datetime>
<o-dd:start>2005-01-01T12:12:12</o-dd:start>
</o-dd:datetime>
</o-ex:constraint>
</o-ddlay>
</o-exermission>
</o-ex:agreement>
</o-ex:rights>

--boundary-1
Content-type: audio/mp3
Content-ID: cid:bla@cos.pl
Content-Transfer-Encoding: binary

....binary content goes here....