No password box for me to login after i Lock my Comp???

The password box has disappeard after my sccreensaver??? WHATS WRONG?? :'(

I run wondows vista home premiuim 32bit. Just done some recent vista updates. and also updated it to vista sevice pack 2. Not sure if this is the cause but, now when i press 'Start + L' (to lock the comp) it locks the comp, but it does not allow me to type the password in now. There is no windows user picture or password box. to type anything in. After 5-6 min it appears. this happens after a screen saver.

Please help... because everytime i lock my computer and then i want to go on it again, i have to wait 5 min. :|

Thankyou
Jeyash

try to turn off the screen saver that loads after you lock you computer or just reduce the lock time on screen saver mode.. under properties.. which will enble your computer to lock by itself and you do not have to use the "start+l" then but you will get the log in box as soon as you move your mouse..
Does that make sense?

I think i may have wrote may question wrong. I want to lock my computer. When i just go out for 5-10min I lock my computer and then I come back. However when I do lock it, it should appear with my user picture and a password box and the button for me to click login. however it does not come up for around 7-8min. Then it just appears. Basically, i have to wait 7-8min before i can log in again because there is nowhere for me tp type my passwords.
Hope this helps