Can not add or edit replies into forums

Can not add or edit replies into forums

Hi, we are users of zoho project services since the beginning of 2011. We are having some problems when trying to post new entries into an existing forums because the cursor does not appear and it is not possible to write.
 
In addition, when selecting any option, we need to do it twice in order to have the system response.
 
Can you help us to solve these problems? Thanks,