C9.5 + 10: No insert nor send effects working!

Xcuse me for posting this again - new to this forum…I imported wav files from a 32 trk project made in PT. Problem is that I only can monitor effects, both inserts and eff. sends, when routing tracks to groups. Another prob is that Cubase suddenly stutters like a very short loop though the average meter load is only maxed at 50% and real time peaks very low, but with spikes now and then. And disk reads absolutely nothing! Anyone, plz?

SOLVED! Found this workaround: After having imported the 32 tracks, you add 32 new empty tracks and move the imported lanes down to the new (empty) ones. And voila!