Oakydoaky

Here goes, my first ever post on here thinking it might be related to this thread. I've just bought a brand new Husqvarna 3120XP with a 42" solid bar and chain. Trouble is I can't get the chain to sit on the sprocket and bar so that it runs freely. I think I've potentially ruined the chain after firing her up thinking I'd got it and noticed some sparks coming from under the sprocket area. Some of the chain guides now don't fit back into the bar. I've bought a new chain H64 404" 0.63"/1.6mm but still the chain won't run freely and looking underneath towards the sprocket the chain doesn't align properly between the sprocket and bar. I've spent hours trying to figure it out but getting nowhere fast. There's no point in firing her up again as I'll only damage the new chain again. I have over 20 years experience with Huskies - 135, 346XP, 350, 555 and 372XP but I'm scratching my head on this one. Bought online from a well known retailer. What to do?? I don't have a smaller bar and chain to use that would be compatible