helpme THE I PHONE CANOT BE RESTOR ANERROR OCURED 20

[jaasharaf]

i install the i tune 7.5 version, i want toconvert to 1.1.4, but still askin (i tune liberry created), after the problem is solwed, (i will see anthor solution i-phone could not restore), and install 7.5, ,press shift & restor button then ask this (THE I PHONE CANOT BE RESTOR ANERROR OCURED 20) eror 20. what will i do ani one no
thankuuuuu adva;