Fwd: ldap search filter problem

[Graham Barr]

Begin forwarded message:
From: [EMAIL PROTECTED]
Date: 5 December 2003 22:23:49 GMT
To: [EMAIL PROTECTED]
Subject: ldap search filter problem
Message-Id: <[EMAIL PROTECTED]>
Hi,

I am having trouble doing a existing filter search on my LDAP 
directory.
My LDAP directory is openLDAP v3 server. I am using the Net:::LDAP API 
for
my querires. I cant do a search with a filter like

1. (attr=*)
2.( &( attr='value')(attr1='value1'))
The search number 2 runs perfectly if the & is replaced by |
Can you exaplin why this is happening

Sincerely,
Sharib khan