Hi Joemai
For NOC B your minimal overall CLB score has to be 5.0 (see link below).
http://www.cic.gc.ca/english/immigrate/cec/language.asp
According to the website (see link below), that is only achieved if you score 5.0 in three abilities and 4.0 in one ability.
Your scores are 5.0 in two abilities, 4.0 in one ability and 4.5 in one ability. I believe this could be an issue. I am sorry, but, it seems that you may have to give your test again.
http://www.cic.gc.ca/english/immigrate/cec/language-testing.asp