Since you've got 3 posts I'll assume you're kind of new.
Many guys, myself included, have erection difficulties both in everyday life (depending on your age and personal circumstances) and at the beginning stages of their Penis Enlargement life and/or routine.
Normally, you will blow past this problem after a certain amount of time...depends on the individual and his routine.
From what I've experienced, the 20 min to 30 min jelq sessions seem to pull me right out of the slump. For example, last week I experimented with the 5 min jelq session followed by doing my 50 Uli's twice per day. I was fine during the workout but for sex I struggled big time! Yesterday I did two 20 min sessions (am/pm) and BAM! rock hard sex. I think 20 min is long enough personally...and then sometimes it will take a couple of days to about 3 months at the longest to fix the problem. You have to be consistent and be patient.
You'll need to keep reading and using the SEARCH button and then experiment with things to see what works but don't over-complicate it...keep it simple.
Oh, and one more thing...kegel every 4th or 5th jelq for a few minutes. Now go kick ass!
The end.