Retrieving data from ProfileManager database

Hello

I have the next information which locates in ProfileManager database (SQL 2000):

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"

xmlns:UserInfo="http://example.org/stuff/1.0/">

<rdf:Description rdf:about="http://www.contoso.com/csf/pm/syedabbas/User1">

<UserInfo:FullName>User1</UserInfo:FullName>

<UserInfo:UserId>1</UserInfo:UserId>

<UserInfo:Content>

<rdf:Description rdf:about="http://www.example.org/Ch1">

<UserInfo:ContentCategory>xRate</UserInfo:ContentCategory>

</rdf:Description>

</UserInfo:Content>

<UserInfo:Content>

<rdf:Description rdf:about="http://www.example.org/Ch2">

<UserInfo:ContentPrice>0</UserInfo:ContentPrice>

</rdf:Description>

</UserInfo:Content>

<UserInfo:Content>

<rdf:Description rdf:about="http://www.example.org/Ch3">

<UserInfo:ContentName>Channel3</UserInfo:ContentName>

<UserInfo:ContentPrice>10</UserInfo:ContentPrice>

<UserInfo:ContentCategory>xRate</UserInfo:ContentCategory>

</rdf:Description>

</UserInfo:Content>

</rdf:Description>

<rdf:Description rdf:about="http://www.contoso.com/csf/pm/syedabbas/User2">

<UserInfo:FullName>User2</UserInfo:FullName>

<UserInfo:UserId>2</UserInfo:UserId>

<UserInfo:Content>

<rdf:Description rdf:about="http://www.example.org/Ch2">

<UserInfo:ContentName>Channel5</UserInfo:ContentName>

<UserInfo:ContentCategory>Cool</UserInfo:ContentCategory>

</rdf:Description>

</UserInfo:Content>

</rdf:Description>

</rdf:RDF>

Now I want to retrieve, for example, for User1 next information with help of ProfileManager SPARQL query, but I fail.

<UserInfo:Content>

<rdf:Description rdf:about="http://www.example.org/Ch2">

<UserInfo:ContentPrice>0</UserInfo:ContentPrice>

</rdf:Description>

</UserInfo:Content>

Could you please help me with this

Thank you in advance!