Code:
define OSC 20       'Set PBP Osc clock to 20Mhz   <----- use DEFINE not define
CMCON0 = 0     'Turn off comparators, force set to 0 (off)
Download and double-check your 16F684 datasheet (DS41202F, Section 8.2, Figure 8-5, Page 58, block in lower right corner).

Common problem, trips me up about every other month on one project or another...