Try this

Code:
@ device  pic16f628a, hs_osc, wdt_off, mclr_off, protect_off ,pwrt_on, bod_on, lvp_off, cpd_off
This is needed since MCLR is used as an input. You may also change HS_OSC to XT_OSC since HS is used for resonators and XT for a crystal.