Hello Chris
As far as I know, Rollei papers are rebranded Foma, so your paper probably is Fomaspeed Variant paper. Back in 2009, I tried some Fomaspeed Variant 312 and I recall toning it in both selenium and sepia. This paper responded quite nicely in both toners, far better than the meh effect Ilford RC papers produced. I think I toned in selenium (KRST) 1+19 and got a nice chocolate brown tone. What might make a difference and you haven't told us is the developer you used. Back then I had some Agfa Neutol WA, a warm tone print developer.