Skinny dude trying to gain weight, probably doing it wrong and need advice.

To start off, I'm very inexperienced with all of this, I just want to gain weight. I'm 25M, about 60KG (132lbs) and I'm 6'3. So from that you can probably tell i'm skinny as heck.

I've tried for years to gain weight but i've failed each time.

I'm trying to count calories to see how much i'm eating. Over the last week i've checked each day and i'm eating between 1300-1500 a day. This is obviously too low and it's been eating the same way for about 2 years with slight variations.

I've got a weight gainer that i bought before when i was at the gym. I am having 1 scoop in the morning now with semi skimmed milk, this gives me about 500 cals, lunch is about 600, tea/dinner is about 400-500 (varies every day as I don't make it) and I have a snack at night which is about 200. This is better but the only real gain is from breakfast with the shake and it's still nowhere near my goal.

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What else can I eat to give me more calories? I eat a lot of pasta, so my carb intake is easily the highest, I eat some form of meat and veg/fruit every day.

I was at the gym before, but got an injury that caused me to be out for over a year. I plan to go back once my eating is sorted out.

Aiming for 2500-3000 cals per day.

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Edit: So this seems to have gotten a bit of traction. Thanks everyone for the advice, I hope there are things in here that help other people too.