My router P/N is BIR 825 ANA...B1 Model DIR-825 and currently has firmware v2.02NA. I think the latest version is 2.07. My problem is I cannot upload this version to my router. I have tried sever time follow tips I got from web searches but none seem to work. I saw something about needing to upload each version in sequence but don't know where to find these versions for downloading. Any help with this would be greatly appreciated.