Failed. Next Try With 5000 Ivs

This means the system has tried to derive the key using a certain number of unique IVs and failed. It automatically raises the threshold to 5000 IVs – a statistical sweet spot where the probability of a successful key recovery (given the RC4 weaknesses like the Fluhrer, Mantin, and Shamir (FMS) attack) becomes viable.

Sometimes 5,000 isn't enough. Many WEP keys require 40,000 to 100,000 IVs to be successfully cracked. failed. next try with 5000 ivs