difficulty aligning to IGKdel reference

[HLAmolec]

Hello,
I can't get igblast to call a del in J IGK gene from custom reference file I've made. It works with blastn but not igblast. Could you please suggest how tweak the parameters to get it to work?

reference:

IGKDEL
GGTACCTGAAGAATTTTCAGGATCAACATTTGTAAGCATTATCAGCCCAGGATAATGCTTATTTACAGCA
GTTCAACTTTTCTCACCTGCAGTAGTTTACTTTGATGAAATCCTGCTTATTTTTCACAATTAAAATTGCG
TCCATGGCCCTTGTTACCCTTAAGAATTATATTTTGCTGACACAATCTCTTTATCTACATTTCACCTAAG
TAAGCTTTTTCTTTACATGATTTTAAGTCATTTTCCAAAACAGAAAAGCATAATTATACAACCTTCTATG
TGTATTGGAGGAAAAAAAGGGTCACACAAATAATAGTACACTCTCTCAGTTAAGGAGTAGGCAGGAGGAG
GGGGTTGAGAAAGACAAACCAGAAAGAATTACATGAAATTTTCCTTCCTCCTCACTGAGCCTCCCTTGAA
TTGTCCAATAATATCCCCCCAACACACACACATAGACACAGAGCAGACTGTGAGGGACACGCAGCCTGGG
TGGGACTCCAGGAGCCAGCTCTTACCCTAGAGTTTCTGCACGGGCAGCAGGTTGGCAGCGCACACTGTGG
GAGCCCTAGTGGCAGCCCAGGGCGACTCCTCATGAGTCTGCAGCTGCATTTTTGCCATATCCACTATTTG
GAGTCTGACCTCCCTAGGAAGCCTCCCTGCTCCCTAGGACAACCTGCTCTGACCTCTGAGGACCTGTCTG
TAAACGTCCAGAGAAAAGCATGTGCCTGAAGGGTCTATGAAGGGGCTTGAGGCAAGTAGGGAGCCCAGCC
CAGCTAACATTTGCAGCCATGGGATGGCTTTGTGTACCTAGAAAAGCAAAGATGAGGACTAGGCGAGCAC
AGGCCCCAAACGTTCACGATACACATCTCACTGCAAAGAAATGTCCTCTGGCCACTTTATAATGCAGCTC
TAACTATAACTGGTGCTTTGCTGGTTTGTGGCCTGGGCTGGTCTCCCAGAGTCAGTGGCTTTGGGTGAGA
TGGCTCCAGGAGACAGCAGAAACTCTCATATATGAAGCCTTGCTTGCAGCGATTTGAGGCTTACTAGGGA
AAAGCCATGATGGGTTTTATAGAGCATTAACTGTGATACGCCATCTAGGGCTGAGAGCTC

Test sequence :
AGAGCCGCGGTCTTTCTCGATTGAGTGGCTTTGGTGGCCATGCCACCGCGCTCTTGGGGCAGCCGCCTTGCCGCTAGTGGCCGTGGCCACCCTGTGTCTGCCCGATTGATGCTGCCGTAGCCAGCTTTCCTGAGCCCTAGTGGCAGCCCAGGGCGACTCCTCATGAGTCTGCAGCTGCATTTTTGCCATATCCACTATTTGGAGTCTGACCTCCCTAGGAAGCCTCCCTGCTCCC