c++ - glDrawElements not drawing anything to screen -

whenever try draw mesh using gldrawelements, program gets no errors, doesn't draw anything. i'm pretty sure issue gldrawelements since if comment gldrawelements out , replace gldrawarrays, works perfectly. so, question is, can me figure out why happening?

also glgeterror returns no errors

#include "mesh.h"  mesh::mesh(glm::vec2* vertices, glm::vec2* texcoords, glushort* elements, int size) {     m_size = size;     m_vertices = vertices;     m_elements = elements;     movementvector = glm::vec2(0.0f, 0.0f);      glgenvertexarrays(1, &vao);     glbindvertexarray(vao);      glgenbuffers(1, &vbo);     glbindbuffer(gl_array_buffer, vbo);     glbufferdata(gl_array_buffer, size * sizeof(float), vertices, gl_dynamic_draw);      glenablevertexattribarray(0);     glbindbuffer(gl_array_buffer, vbo);     glvertexattribpointer(0, 2, gl_float, gl_false, 0, null);      glgenbuffers(1, &tex_vbo);     glbindbuffer(gl_array_buffer, tex_vbo);     glbufferdata(gl_array_buffer, size * sizeof(float), texcoords, gl_static_draw);      // note: assume vertex positions location 0      int dimensions = 2; // 2d data texture coords      glvertexattribpointer(1, dimensions, gl_float, gl_false, 0, null);     glenablevertexattribarray (1); // don't forget this!      glgenbuffers(1, &ebo);     glbindbuffer(gl_element_array_buffer, ebo);     glbufferdata(gl_element_array_buffer, sizeof(elements), elements, gl_static_draw);  }   mesh::~mesh() {     gldeletevertexarrays(1, &vbo); }  void mesh::draw() {     glbindvertexarray(vao);     glenablevertexattribarray(0);      //gldrawarrays(gl_triangles, 0, 8);      glbindbuffer(gl_array_buffer, vbo);     glvertexattribpointer(0, 2, gl_float, gl_false, 0, null);      gldrawelements(gl_triangles, 6, gl_unsigned_short, null);      gldisablevertexattribarray(0); } 

here's link code handling drawing objects screen, also, have tested shaders, functional , unless drawing via gldrawelements requires changes shaders well, there nothing causing them.