is that error cause from ImageCache?

I get error when I try to upload an image:
[code]
{ "status": true, "data": "\x3cdiv id=\"edit-field-image-cache-0-ahah-wrapper\"\x3e\x3cdiv class=\"form-item\" id=\"edit-field-image-cache-0-upload-wrapper\"\x3e\n \x3cdiv class=\"filefield-element clear-block\"\x3e\x3cdiv class=\"widget-preview\"\x3e\x3cdiv class=\"imagefield-preview\"\x3e\x3cimg src=\"http://localhost/sexy-mechti/sites/default/files/imagefield_thumbs/produ...\" title=\"4j3lues.png\" alt=\"Image preview\" /\x3e\x3c/div\x3e\x3c/div\x3e\x3cdiv class=\"widget-edit\"\x3e\x3cinput type=\"hidden\" name=\"field_image_cache[0][fid]\" id=\"edit-field-image-cache-0-fid\" value=\"782\" /\x3e\n\x3cinput type=\"hidden\" name=\"field_image_cache[0][list]\" id=\"edit-field-image-cache-0-list\" value=\"1\" /\x3e\n\x3cinput type=\"submit\" name=\"field_image_cache_0_filefield_remove\" id=\"edit-field-image-cache-0-filefield-remove\" value=\"Remove\" class=\"form-submit\" /\x3e\n\x3c/div\x3e\x3c/div\x3e\n\x3c/div\x3e\n\x3c/div\x3e\x3cscript type=\"text/javascript\"\x3ejQuery.extend(Drupal.settings.ahah, { \"edit-field-image-cache-0-filefield-upload\": { \"url\": \"/sexy-mechti/filefield/ahah/product/field_image_cache/0\", \"event\": \"mousedown\", \"keypress\": true, \"wrapper\": \"edit-field-image-cache-0-ahah-wrapper\", \"selector\": \"#edit-field-image-cache-0-filefield-upload\", \"effect\": \"fade\", \"method\": \"replace\", \"progress\": { \"type\": \"throbber\" }, \"button\": { \"op\": \"Upload\" } }, \"edit-field-image-cache-0-filefield-remove\": { \"url\": \"/sexy-mechti/filefield/ahah/product/field_image_cache/0\", \"event\": \"mousedown\", \"keypress\": true, \"wrapper\": \"edit-field-image-cache-0-ahah-wrapper\", \"selector\": \"#edit-field-image-cache-0-filefield-remove\", \"effect\": \"fade\", \"method\": \"replace\", \"progress\": { \"type\": \"throbber\" }, \"button\": { \"field_image_cache_0_filefield_remove\": \"Remove\" } } });\x3c/script\x3e" }
[/code]

I'm using ImageCache version = "6.x-2.0-beta10" (drupal 6.20) which is coming with Uberdrupal.
Can this error be from imagecache or other modules like filefield or upload ?
Actually everything was working fine before but I had some database crashes and reinstall the wamp server.