Protocol error when using OpenLDAP 2.1.22 with Squirrelmail 1.4

[DWrisley@ivexpackaging.com]

I am trying to use OpenLDAP 2.1.22 with Squirrelmail 1.4 and am running 
into a protocol error when using the squirrelmail address book function 
to look up addresses in the LDAP server.

Here is the exact error message I get while in squirrelmail:

Error initializing LDAP server 192.168.1.73:
 [dude ldap] Protocol error



Both the apache web server, the squirrelmail files, and the LDAP server 
are the same machine, IP 192.168.1.73. This PC is running Redhat 9.0

I can access the LDAP data via other computers and with other programs. 
I have several users and other related data in LDAP already. For 
example, I can use a java based LDAP program on a windows machine to 
view and modify the LDAP entries. I can also use another commercial 
win32 application to do the same. A different PC with Outlook queries 
this 192.168.1.73 LDAP server just fine and finds the users I have in 
there.

All other Squirrelmail functions work fine like sending and receiving 
mail, calendar, and so forth.  

I am logging all the data from slapd to a file. Here are the entries in 
this file when I get the error message above:


Jul  8 12:30:55 linux2 slapd[13426]: conn=23 fd=11 ACCEPT from 
IP=192.168.1.73:4816 (IP=0.0.0.0:389) 
Jul  8 12:30:55 linux2 slapd[13426]: conn=23 op=0 BIND dn="" method=128 
Jul  8 12:30:55 linux2 slapd[13426]: conn=23 op=0 RESULT tag=97 err=2 
text=requested protocol version not allowed 
Jul  8 12:30:55 linux2 slapd[13426]: conn=23 op=1 UNBIND 
Jul  8 12:30:55 linux2 slapd[13426]: conn=23 fd=11 closed 



My base DN in Squirrelmail is set to the same as the other external LDAP 
apps that work. That is dc=ivex,dc=com  I have looked in the 
squirrelmail config.php file and verfiried that. I can not explain the 
dc="" in the log above.


The requested protocol version not allowed is what bothers me.  Is 
squirrelmail trying to access my LDAP server using LDAP v2. I have read 
through the  Admin guide and it says LDAPv2 is disabled by default and I 
should be using LDAPv3 (which I am). It also states that running a mix 
of V2 and V3 is problematic. 

Has anyone else ran into this problem with squirrelmail and LDAP?