ExtremeDwarf this is not the solution.With your answer is like you tell us that in the previous versions of smf,you couldn't even make a post?And 1.1.11 is like the bugfix and you can post now huh?
The answer is No
The problem is just your free host.Your webhost's server is slow and probably overloaded,because it is free,and many users like you, share the same server recources.
And yeah the solution is this,the forum script is ok,and no fix is needed to be done.You only have to move to a better freehost,that you can at least make a post.Good luck :D