problem using wildcard search

[swarajit <swarajit@mahindrabt.com>]

hi,
  i am new to openldap, i am performing a wildcard search from an  
enterprise javabean for a paricular   search.. with my customized
attribute 'lsmuserid'
  snippets of code below..

	private static  String MY_SEARCHBASE = "ou=lamcou,dc=mbt,dc=com";
        String uid = "didi123";
     	MY_FILTER="(lsmuserid="+uid+"*"+")";
	SearchControls constraints = new SearchControls();
	constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);
	NamingEnumeration results=null;
	results = initctx.search(MY_SEARCHBASE,MY_FILTER,constraints);

the code gives no searchresult find even though the ldapsearch tool
provided in openldap-2.0.8 shows the
results of the entries... 

am i making a mistake ? please help me cos i am in a serious time crunch

thanx in advance
with best regards
swarajit