select neutral or park if auto if manual place out of gear, run wire from posative side of battery to solenoind on top of starter taking care not to let wire touch chassis.
starter should turn over.
how many small conectors have you on solenoid ?
some solenoids have two one from igniton switch and one for cold starting device, if youve mixed them up the sloenoid wont engage.
1. What kind of problem did you have before you changed the starter?
2 . When you state it won't start, Just what does it do , Nothing, Just clicks, cranks over but won't start to run ? Remember the old saying, "Don't assume ", so I'll ask did the car run before you changed the starter?