Problems with ray and member joining,

I intstalled dolphin 6.005 with ray and orca....At first after installation the page wouldnt open as it showed 500 internal server error. I read here somewhere and removed the .htacess file and it started working properly..
When i wanted to install plugins from my admin area it said not installed for both Ray and Orca.
Also when somebody wishes to join my site no security image is being shown so no1 can join.
Can anyone please tell me what sould i do?
The ray suite isnt showing anything it only says not installed in a new window//////////