Hello all!
My name is Ansumana Kamara. It is my first time of using Kobo Collect Tools. I have already design a project using excel but i am having difficulties to upload the form. Please help!
I would have love to upload the file but i am unable to do so.
Warm welcome to the community. Feel free to introduce yourself here whenever you get a chance to. Also, I would kindly request you to post the further form design related queries in the "support" section (the one designed for the same) and not in the "development" section! 
Coming to your query, even though Kobo and ODK shares a very similar design, yet it's advisable to post the Kobo related issues at the Kobo Community Forum. In general, there can be many different reasons for why some form couldn't be uploaded to the server. Did you get any error messages? 
Wishing you a great day ahead!