Hydraulic Cable Guide Problem?

[Ottoreni]

I have a Stumpjumper '03 hardtail. It is setup with Avid SD7 levers and V-brakes and Flak Jacket housing,. The front brake works brilliantly, but the back brake has been nothing but a hassle.

I just recently built up this frame (my first build), but on three rides I have been on the rear brake becomes practically useless within 15 minutes of riding.

Here is the problem. My Stumpjumper has the cable stops for the rear brake running along the top tube, but these cables stops are large. My guess is they are for hydraulic brake housing, not regular brake housing. The ferulles slide through, always the front one, and my brake cable comes loose and presto! My rear brake is useless.

Is there a special adapter ferulle I need to get? Do I need to run housing all the way to the rear?

Thanks for any information!

[Knut]

Yep, there is an adapter - your LBS should have them available...