Tascam 122L Audio Interface

So I just got this today for 2 reasons:
1. To record, since my Shure mic can't plug into the laptop just like that.
2. To use my headphones after I screwed up the laptop's input jack thing.
Now, the recording sounds fine. A bit quiet, but I haven't messed with the settings yet. My problem is with the headphones. Mine have your usual 1/4" jack, but it doesn't fit where it says headphones.
Here's a pic:
See the middle one where it says PHONES? Well, it's too loose
Read the manual bout 3 times and went to Tascam's site. Nothing helpful. Any ideas/solutions?
1. To record, since my Shure mic can't plug into the laptop just like that.
2. To use my headphones after I screwed up the laptop's input jack thing.
Now, the recording sounds fine. A bit quiet, but I haven't messed with the settings yet. My problem is with the headphones. Mine have your usual 1/4" jack, but it doesn't fit where it says headphones.
Here's a pic:

See the middle one where it says PHONES? Well, it's too loose

Read the manual bout 3 times and went to Tascam's site. Nothing helpful. Any ideas/solutions?