Question?

[chocostar.livejournal.com]

I am making a necklace using nylon thread and i have added a clasp at the end and i want to use pony beads but problem is the clasp at the end is smaller than the hole of the pony bead and therefore the bead falls of. How am i meant to prevent this i dont really want to make it look out of place if the whole thing is done in pony beads and at the ends there are 2 random beads.
Are there any other ways?