I am a qualified hairdresser, I sounds like you are not leaving it on for long enough, first coulour to come out of hair is red hence the orange colour but please, go and get it done by a hairdresser, they are really harsh chemicals and you could really cause damage to your hair otherwise.
The peroxide in the boxed kits is probably not strong enough, or it's been left on the shelf too long, it oxidises with time and makes it weaker. Is it definitely bleach you are using? Would normally be blue powder with a creamy white liquide to mix with?
I am SOOOO glad I don't color my hair :S
Too much of a pain to color hair going through all that trouble