Upload not send to ICAP ASM V10.2.4

We are running BIG-IP 10.2.4 Build 817.61 Engineering Hotfix HF7

I'm using an ASM policy (match on a specific uri) to send uploads to the icap service. The traffic is hitting the policy, but with tcpdump is notice no requests are send to the icap service. It is configured in option>antivirus protection. In V11 there's a seperate option in a specific policy to activate it, but this is absent in 10.2. I've read you just have to configure it in poliyc>blocking>settings and tick alle the boxes for "Virus detected".

Am i missing something? I think i do, but do not know what it is.