RCTgo

Can anyone help me with saving a OVL in the CTR Creator, it always either says a non valid pointing value and if i get past that it says something like access is denied, i just want to make a type of giga coaster that does vertical drops (Ex: Imtimidator 305 at Kings Dominon, Doswell VA.(live 20mi from there)

Other Info
Running Windows Vista HB on a Acer Aspire 4330.