My site opens very long time and sometimes instead of opening an error.
Optimize, and clean out the cache often
[size=150]site weighs a little!!!/size]
Whats the problem?
The problem is (as said in the german part of this forum), that server(s) will be changed. Please keep patient 
Write in detail plz.
That is all detail that I can tell you. =)
will something happened with my site??
Your Site should be fine.
