potty traning nightmare

Potty training Adrian has been quite a challenge.  Talk about patience, endurance and perseverance!  We started about 4 months ago, but not really, because he was on pull-ups.  Pull-ups are nothing else than an upgraded diaper - the only difference is that you can pull it up and down.  I told Adrian that he was going to be wearing "big kid underwear" but he still called them diapers.  No difference.  He would get wet, and I would give him the "you need to tell me when you need to go" speech, but it had little to no impact on him.    That went on for about 4 months.  I kept cleaning after him and all - just like a diaper.  
Then, on February 9th, I run out of pull ups and I decided to "upgrade" the potty training to regular underwear that I had purchased for him weeks before.  I told him no more diapers - he begged for "diapers" but I said he was a big boy and he could wear underwear as his daddy and big brother.  Then, the real adventure began.

He will not say when he has to go, I have to keep asking him - and although the answer is ALWAYS no, I would take him anyways and he will go.  Sometimes, he is saying no while he's walking towards the bathroom!  Here is something I do not get: When he is thirsty, he asks for water or juice.  When he's hungry, he asks for "fishies" (fish crackers) or "dinosaurs" (chicken nuggets in dinosaurs shape). When he wants to watch a certain show, he will ask for it: "mommy, I want Diego" or "mommy, I want George" (as in "Go Diego Go" or "Curious George") Or when he's done with dinner and he wants "pote" (postre, Spanish for dessert).  He obviously knows how to ask for things, why can he tell me when he has to go. 

Let me share a little episode from last week. 
Victoria (my one-year old) woke up from her nap, As I was getting Vicky out of her crib, I heard Adrian in his room - he had woken up as well.  I had Victoria on my arms when I walked into his bedroom.  I asked him if he had a good nap, he said yes.  Then I asked him if he had to go to the bathroom, that's when he lost it!.  He started to cry and to say, he didn't have to, but he then started to walk to the bathroom while he was whining.  I had him standing on the toilet.  He still refused to go.  So, I got him down the little stool and asked him to get his pants up.  I turned around for one second and he went - all over the floor, his pants, socks, everywhere! He is crying hysterically by now!   I had to go get Victoria to her chair - much to her dislike - come back to the bathroom - yelled at him for peeing all over himself (then feeling terrible for having done so) I stripped him naked and put him on the tub to wash him - he is crying and sobbing.  I run to get the mop to clean the mess and he yells: "mommy poop!" so I run back to the bathroom, I get him out of the tub, sit him down on his toilet - and he goes.  He is still crying and sobbing and I can hear Victoria crying because I left her in the living room strapped on her little chair. I bathe him after and he eventually stopped crying as he sat down on the couch to watch "George" per his request.

That's only one episode - there are quite a few just like that...

I am not giving up on Adrian.  He is a smart boy - a bit stubborn  - but very smart.  I know he will get it.  I am confident in that.  Meanwhile, I have to keep my cool and be more patient.