hi,
u only created the free trail online version of Microsoft dynamics crm 2013?
or somebody created user for the crm2013 for the online version?
tell me clearly
u only created crm2013 trail version online u may be the admin u have all permissions to acess whole crm
or some body or administrator created the user may be he forgot the administrator role given to u
once check with him/her properly
u have administrator role no doubt in that u have full acess permissions to access the crm 2013
once check it