What about this steal attempt?

[JasonP530]

I dont know if I should be making steals like this. I tend to shy away from stealing into low stacks like this with marginal hands, as I am afraid they will move in/call, and I will have to invest a decent portion of my stack with a hand like 44. Should I be raising this or was my fold ok?

Table Table 12976 (Real Money) -- Seat 8 is the button
Total number of players : 7
Seat 1: bongswat (1833)
Seat 4: Teksun (642)
Seat 5: bub_club (1970)
Seat 7: Thegra (1350)
Seat 8: hero (1935)
Seat 9: Sevillano720 (1700)
Seat 10: freakyfriday (570)
Sevillano720 posts small blind (50)
freakyfriday posts big blind (100)
** Dealing down cards **
Dealt to hero [ 4c, 4s ]
bongswat folds.
Teksun folds.
bub_club folds.
Thegra folds.
hero??