Got some phoblems here! NEED HELP!!

Hi there,

I'm using 7.01 version and I have changed everything into Thai. Everything seem ok but something doesn't work when I tried to use it.

Well, I've got 4 problems here. Please give me a help.

1) When I tried to sign up to become a member (for testing), I've got only a white page from the Internet Explorer which show like I could not get through to the next step. But when I hit on back to the previous page, I will see my username on the page (at Logout [username]).

2) When I sign in to the forum and tried to send a mail to a member (or myself aswell), it did not work. I've got only a white page from the Internet Explorer which show like I could not get through to the next step.

3) When a member tried to use a form to get a new password. After input the username and e-mail address, the member will get a white page from the Internet Explorer which show like I could not get through to the next step.

4) I would like to know how to set quick login into any pages.

Anyone know how to fix these problems, please teach me step by step. I'm not an expert.

Thanks in advance for help!