[pritesh_shah83]

Originally Posted by vietdjclub

still got this problem:

Fatal error: Cannot instantiate non-existent class: webchattr in /xx/xxx/xxx/xxx/index.php(411) : eval()'d code on line 7

That's really weird. I tried installing it again on a fresh copy of vb3.7.2 and it worked for me. This is the deal:
The class webChattr is included by executing the plugin "Include webChattr class file" at the global_start hook. Now since you have vb3.7.2, it should work for you. Please verify the following:

1) Make sure all three plugins are active
2) These should be the hook locations for the plugins:
Include webChattr class file: global_start (THIS IS NOT WORKING FOR YOU!!)
Display Page: forumhome_loggedinuser_query
Add Chat Link to Navbar: global_setup_complete

If the mod still doesn't work for you, I would recommend uninstalling the mod and then using the webChattr3.5.x & 3.6.x.zip file for installation. It is a bit more work to install (still takes less than 5 minutes), but the good thing is that it doesn't use hooks or plugins at all and should ideally work for you. Please give it a try