Dear Experts

I am using SQLSERVER 2008 R2.

Want to send backup from server to client
For this I am trying this code

filename='accounts'
mdest2='\\Sales\d'
target1=ALLTRIM(mdest2)+ALLTRIM("\")+ALLTRIM(filename)+ALLTRIM(".bak")

MESSAGEBOX("Backup path is"+CHR(13)+target1,0+64,"SQLSERVER")
nresult=SQLEXEC(m.con,"backup database &filename to disk='target1'")

IF nresult<0
	MESSAGEBOX('Backup Faild-1',0+64,'Backup')
	RETURN
ELSE
	MESSAGEBOX("Done")
ENDI

but it says:
Backup Faild-1

Please help