While Changing Theme

Hi there,

I have a problem. I encountered this problem while trying to change my theme. When i click the activate button after previewed it, it was not responded then my blog disapperead. Now either wordpress panel and my blog cant seen.

Actually I have a solution in my mind but i do not know how to apply. My question is following. Is there any way to change a blog’s theme without logging into panel. (so i cannot logging, as well) If, so i will activate another theme which i uploaded my server then i hope it will work.

Please help me to figure out this problem. I am looking for a solution both for my idea or other solution. Thanks in advance. My blog’s link is http://www.yourpersonaldevelopmenttips.com