I've previously upload countless video through MAGIX and they've all worked fine now i go to upload today's and it won't do it, it gets past the processing part and then when i'm asked to sign in it refuses and says there's a connection problem when there isn't. help please.
Export the video from MEP in the correct formt / resolution - see Youtube guidelines here
Then use the Youtube uploader.
. . . . says there's a connection problem when there isn't. . . . .
There is, and it is most likely that Youtube have changed their upload API's and broken MEP and any other software that has built in uploading to Youtube and relied on older APIs.
John is right, just don't use the Magix upload to get your files to youtube. I have 3 video editors with "automatic" youtube uploads and since the google takeover of youtube, none of them work. Just do it the old way. Export the file and go to youtube and upload it.