Why am I not able to enter Recovery Mode?

[AC Question]

I am having issues with my Tab 4 (SM-337A) I tried rooting this tablet and it worked out after watching many videos on youtube. The issue is that when I turn off my tablet and try going into recovery mode, my tablet turns on and quickly goes into the Android logo that says "Downloading.... Do not turn off target". At the top it says "could not do normal boot". I tried downloading the firmware from Samsmobile, but the download stops in the middle and says network error. My only hope was to reset it using odin with the firmware but I can.t even download it. I tried going into settings-> and then recovery or something and tried factoring resseting but then it leaded me to the same thing, which is the Loop page with the error "could not do normal boot"