Can't access my main domain

[sammojab23]

Hello.
Today I tried to open my main domain (www.symbian3themes.tk) but it opens
http://x10powered.com/errors/404.shtml
But I can open my sub-domain (blog.symbian3themes.tk).
What's the problem?
Thanks.

---------- Post added at 07:03 PM ---------- Previous post was at 10:21 AM ----------

Can someone help me resolve my problem?

[sammojab23]

Hi.
Now I just see a white page. And still can see my sub-domains.
Help please...!

[Jake]

Most likely you do not have a page in your public_html for the index OR you may be trying to run a script that is having errors. Check for a error_log that will tell you what is wrong.

[sammojab23]

Thanks for your answer.

I couldn't find error_log. I think it means there's no problem, no?
But sometimes I can see my site and sometimes I just see that white page. So I don't think the problem is from my CMS or a script.

[sammojab23]

After opening my admin page my website loads but if I don't open admin page I just see that white page.
Help Please...!