I can't focus my telescope/ I can see images with the 26mm lens out but when I put the 26mm in all I get is a small pin hole of light. I turn the focus knob but I get nothing. What al I doing wrong. The dvd said that the viewfinder will align images but not with the ETX-90AT. All it does is pin point an object with a red light. Any suggestions? I did buy the auto focus device but still noting. HELP!

Optics - Meade - Astro ETX-90AT Telescope