مشکل این کد کجاست که هم تو کوئری اس کیو ال و هم تو برنامه یک خطا میده

"SELECT sanadcaption.captionid,ashkhasgroups.groupname,ash  khas.name,sanadcaption.regdate,sanadcaption.type,v  isitor.visitorname,sanadcaption.jamekol,sanadcapti  on.visit FROM sanadcaption INNER JOIN visitor ON visitor.id=sanadcaption.visitor INNER JOIN ashkhas ON ashkhas.id=sanadcaption.ashkhas INNER JOIN ashkhasgroups ON ashkhasgroups.id=sanadcaption.shcod WHERE regdate between '" + mtxtdate.Text + "'AND '" + mtxtdate2.Text + "' WHERE name='" + comboBox2.Text + "'"