LDAP Field Name

I have a page which grabs data from Active Users which was working great last week. All of a sudden my code doesn't like some of the field names. For the purpose of keeping this short let's just say it's one field 'Department' Code:

Dim department
MyFullName = "FRED BLOGGS"
SQLStmt = "SELECT name,physicaldeliveryofficename,department " & _
"FROM 'LDAP://lvp-ad.myserver.wan' " & _
"WHERE objectClass = 'user' AND name='" & MyFullName &"'"
Set Conn = CreateObject("ADODB.Connection")
Conn.Provider = "ADSDSOObject"
Conn.Open "ADs Provider"
Set rs = Conn.Execute(SQLStmt)
So, if i remove department all works fine. Any help appreciated.