How can i go to recovery mode on my Lg optimus l7 p700 ?

Hi everyone....i've followed your tutorials about rooting , instaling customs roms ect ect , and everything was okay i've installed many of cutom roms (cm10. aokp..ect) but finnaly i found in your site guys a stock rom named "V20E_HybridStock-Release01" , i instaled it it works perfectly but in the tutorial they said that i should install the "kernel" :fingers-crossed: ..but there is my probleme :( , when i installed the kernel my phone stay on the Lg logo and don't start :eek: and when i try to go to the recovery mode (volume up + volum down + home + on/off button) nothing happens the recovery mode don't show !

what should i do to enter the recovery again and re-install my stockrom :( ?? pleaase hellp !!! :( :( :(

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