ok i go on replay thread to post my replay, but i do not how to insert the file

To post replays:

Click on the "Go Advanced" button underneath the Quick Reply field << Scroll down under the post where you should see "Manage Attachments" (under the Additional Options section) << Click on "Manage Attachments" and select the replay(s) (usually located in: My Computer << Local Disk (C:) << Games << Toribash << replays) you wish to post (you may select up to 5 at a time, 1 per each field) << after selecting the replays, click on 'Upload'. The replays are now attached to your post.

For step-by-step instructions, see this.

ok thanks, i'll try that