hostgator and wprobot question

Anyone having problems with it auto posting?
If i run it by the post now it works fine and on one site it works fine but trying to get it to run on subdomains and other domains it wont auto run
I am wondering if i need todo the cron job instead?

Any thoughts?

One shared account will take only 10-12 auto blogs at the most.

You also need to in a blog on each subdomain(the main blog does not extend to the subdomains.