Openldap password problems

[jeevan kc]

Hello all,We've just noticed that when a user authenticates via LDAP, it  
ignores characters after the right password. For example a user jkc900 has 
Password Welcome1 But the user can type in Welcome1111  or Welcome12 etc and 
still can get into the application. Its just checking the first Welcome1 and 
they can type anything after that and still can log in.  We've tested at least 
50 users and they all have the same issues. Any clues/ solution for this?
Your inputs are highly appreciated.
Jeevan