Will this Lineup work?

Well im probably gonna buy a Line 6 Filter Modeler 4. And im worried like my old wah it wont work along with my Digitech Rp200a. My current line up is.

Guitar -> Digitech Rp200a --> Boss DD-6 --> Roland Jc120(amp)

when i wanted to put my wah. it wouldnt work, trust me i tried everything. will i be able to put the fm4 in there without problems? and it has to be before the delay. delay goes last. and i use the Rp200a only for distortion. long story. and the thing i dont wanna replace. so please anyone. i need to know. thanks.

what kind of wah are you using? If its something vintage then it's no wonder it won't work but i'd think any boss or digitech wah would be technologically sufficient enough to work... but i've had similar problems... like a russian big muff pi and DS1... it was very confusing but when i put them into different orders and volume levels it kinda worked... although 2 distortions is completely different then delay and wah... but now that i think about it isn't there the wah function on the RP200? it would be easier, i'd think, to just play with that al ittle