LinkedIn help needed

Hi all, hope everyone is well.

I’m running a B2B LinkedIn campaign outreaching to senior HR decision makers, like HR directors, CPO’s and L&D leaders, I’m sending 600 requests per month with about 150 being accepted.

All leads receive a first and second message if no reply, with a third message with a brochure if not reply still. My replies have been increasing but I’m struggling to bridge from rapport to asking for the call.

I’m in week 6 now and have booked 2 calls, one was an old lead that has been reactivated and the other was a lead I connected with and messaged me first.

I’d really appreciate any advice, as I can’t help but feeling I’m behind and failing with this campaign,

Thank you so much! 🙂