Activities List links are not working

Hi,

 In MS CRM 2013 we used a HTML web resource file and there we placed an IFRAME to show CRM Activities. When browsing CRM it is showing the Activities list and the links of the activities are working fine.

But if we browse the web resource directly in IE not from CRM, it is showing the activities grid, but the links of the activities are not working.

Can any one please suggest some solution for this.

Thank you,

Phani.