ASp.net and ldap problem..please help!!

[Amar]

I am trying to connect to my college LDAP directory using ASP.NET. This LDap
does not have security as it returns only user demographic information.
I can only bind anonymously to this ldap. This means binding without a
username or credentials.
What i am trying to do is, i am trying to look up all the information for
the user with user id 'testuser'. The following is the Vb.net code for my
aspx page:

Dim oRoot As DirectoryEntry = New
DirectoryEntry("LDAP://directory.x.y/ou=People,dc=x,dc=y")
Dim oSearcher As DirectorySearcher = New DirectorySearcher(oRoot)
Dim oResult As SearchResult
Dim propName As String
Dim obProp As Object

Try
oSearcher.Filter = "uupid=testuser"
oResult = oSearcher.FindOne
For Each propName In oResult.Properties.PropertyNames
For Each obProp In oResult.Properties(propName)
Response.Write("name= " & propName)
Response.Write("value= " & obProp)
Next
Next
Catch Ex as Exception
End Try

The above code fails at the line "oResult = oSearcher.FindOne" and gives me
an error which is useless: "Unknown error (0x80005000)"
Please help me!! Thanks in advance.