Just want to try to shed some light on this. Many of the big banks have instant loan/credit approval systems that try to assess what sort of repayment risk you might be. So, lived in same address for several years, tick, been in same job for several years, tick, been unemployed or changed jobs frequently (regardless of what you've been doing in that time!!) FAIL. However, they should at least try to fully understand your situation and send it to their credit manager for assessment. Dumb ass banks!
Good luck.