Unfortunately, I'm having similar issues.
After all the hype, I decided to give Parked a test using 10 low-conversion domains I had at SEDO to see if they did any better using Parked landers. I wasn't ready to try my higher payout domains.
Sadly, the CTR is far less than SEDO after 1 complete week - only ONE click (31 cents!) in 7 days with 32 hits per day average (or 214 total hits). So while SEDO was making little money, Parked clearly made no money.
I do like the picture choices with Parked much more than SEDO's extremely limited picture base, however, SEDO still wins the revenue test for me.