Trying to put on more muscle...program needs tweaking

[OfficeGirl]

I'm trying to put some muscle on. I use the gym at work during lunch, so I've only got about 35-40 minutes during the week days. Right now I'm lifting fairly light weights in sets of 15. I'm still fairly new to this, so I'm not really strong enough to lift what many would consider heavy, but it's heavy for me lol. I'm not afraid of a heavier weight. I don't mind a little bulk, as I think that looks sexy on girls. I try to lift quickly to keep heart rate up. I'm looking for some new core moves, too. What more can I do to get better?

I alternate upper and lower body days. On upper body days it looks like this (2 sets of as close to 15 as possible):
warm up
bench press
incline press
front shoulder raise
outward shoulder raise
shoulder press
bicep curls
outward bicep curls
tricep kickbacks
lat pulldowns
tricep extensions
core
-mason twist
-full sit ups
-alternating leg raises

Lower Body:
warm up
squats
lunges
dead lift
calf raises
upward row
lat pinches (bend forward slightly while standing and squeeze the shoulder blades together)
speed skaters
Core:
-Crunch with Leg Lifts
-Bicycles
-oblique side lifts
I think diet is in pretty good shape:
7:30breakfast is 1egg and 1/2c egg whites, rice mea, tea, water
10:00snack: protien shake, 1/4c almonds
12:00 lunch: 5oz chicken, 1/2c rice, green salad with tomatoes and peppers w/vin. dressing
3:00 Snack: repeat morning snack
6:30 Dinner: 5-6oz lean meat, veggies

Please feel free to critique and improve Thank you!

[OfficeGirl]

Sorry for posting twice. I hadn't seen a reply on other, so please ignore this one.