it wont slow down wp as we dont load our stuff (generally speaking) on any other pages except the wp page the forum shows on…

is this shared hosting with restrictive limits?

It is shared hosting with no limits (I hosted on webhostinghub).  How about the script error for eating up too much memory?

that is not our message but one from your host… so clearly not unlimited… what is your php cpu time limit and memory settings?

aditya shukla said
It is shared hosting with no limits (I hosted on webhostinghub).  How about the script error for eating up too much memory?

That looks like an Internet Explorer warning. Do you get the same thing using Firefox? You may have a script conflict causing some errors.

 Might be worth going through this article. http://codex.simple-press.com/codex/faq/troubleshooting/what-is-this-jquery-conflict/

@Papa: not sure how to get these values. I do not see php.ini file on server. By unlimited I meant web space and bandwidth.

@Brandon: Thank you very much. This message is only coming in Chrome browser. Other browsers do not show this message. I have not seen this before as I have installed this plugin before and uninstalled to check others. 

You can look my site at www.agilepm360.com click Forum, Forum takes too much time to load. 

Please go to your cache plugin settings and exclude the forum page from ALL the available options and cache types.
Actually – thinking about it – I would also try turning off the javascript minification across the site. It often causes more problems than it is worth and I suspect you may have some badly loading scripts as well.