email issue with the WINC1500 module

[aliyesami]

iam not sure if this post belong to this group or microcontroller so please move it accordingly.
iam using the SAMW25 module that has winc1500 wifi module. I use it to send email and is working for me but if I try to send it again it doesn't. which steps I m missing ?  I tried to initialize everything to send the email but it doesn't work.

after sending the first email the code hangs at system_init()  and if I comment it out , I get bus initialization error on nsm_bsp_init().

basically for the second email I have included everything that the email example comes with in the ASF library .