Get rid of the diagonal ... for starters . Ya did that.
Does the telescope bring the moon into focus without an eyepiece in the focus at any point within the distance the focusor drawtube can accomodate (use a bit of cardboard and see) , then you need about 2" move focusor intravel to make allowances for the depth of the camera body (from T to chip).
If this can't be done , you need either a better focusor or maybe a barlow.
Ya did that.
Can you select full manual control , and go to liveview , then just focus with the telescope's focusor. Try 1/60 to 1/250 of second exposures depending on the speed you've selected . If it looks over exposed , drop the a faster exposure , TRIAL N ERROR is the name of the game.
http://www.eclipsechaser.com/eclink/...tsmt.htm#guide
Ignore everything except the ASA and exposure reading.