Why wasn't I allowed to reraise?

[Fluffington]

Empire Poker $25NL. I was going to push when I got reraised but the software would only let me call. Is this because of some rule that I'm not aware of?

***** Hand History for Game 1278489705 *****
0/0 TexasHTGameTable (NL) - Thu Dec 09 05:50:31 EST 2004
Table Table 23835 (Real Money) -- Seat 2 is the button
Total number of players : 10
Seat 1: DACiD20 ( $25)
Seat 2: chunji0 ( $37.5)
Seat 3: wang317 ( $20.15)
Seat 4: dkdub ( $6.76)
Seat 5: ssurdu ( $23.25)
Seat 6: bucky50 ( $39.3)
Seat 7: puk123 ( $29.65)
Seat 8: ohren ( $8.15)
Seat 9: brizmt ( $66.1)
Seat 10: toadmeister ( $35.55)
wang317 posts small blind (0.25)
dkdub posts big blind (0.5)
DACiD20 posts big blind (0.5)
** Dealing down cards **
Dealt to toadmeister [ Kd, Kh ]
ssurdu calls (0.5)
bucky50 calls (0.5)
puk123 folds.
ohren folds.
brizmt folds.
toadmeister raises (4) to 4
DACiD20 folds.
chunji0 folds.
wang317 calls (3.75)
dkdub raises (6.26) to 6.76
dkdub is all-In.
ssurdu calls (6.26)
bucky50 folds.
toadmeister calls (2.76)
wang317 calls (2.76)

[swolfe]

his all-in raise was less than a minimum raise, so it didn't re-open betting for you.