Inserting a separator sheet after 5 sheets in a variable job

[DanChak]

Running a variable job on 11x17 stock that requires an insert after every 5 sheets.  Our file sizes are 250 sheets and when I try to set the Insert page command; 5, 10, 15, 20 etc. it stops letting me enter any more characters after 50.  At the moment we've gone with offsetting every 5 sheets and manually inserting the separator but there has to be something I'm missing.

Job was created in XMPie, sent as PDFs.

Thanks!

Dan

[CHIEN TRAN]

Dear DanChak,

you can do it with Insert Pages Preset.

At Page selection 

you chose Page intervals

with start page: 5 and Interval: 5

i don't know how to attach photos in this forum :)  so bad !!!